I would say that it depends on what your intent is. I've found that they don't tend to 'blend' very much, since you end up with full signal up to the center detent, then your initial signal drops away very quickly and you're immediately at full volume with your second signal. For actually blending between 2 signals, I've started using just a normal linear pot, with the 2 incoming signals on the outside lugs, and using the center lug as the output. Did that make sense?